code: def _p(cls, X, alpha):
      return cls._gp_inv(torch.clamp(X, min=0), alpha)
  
imports: import torch
  import torch.nn
  from torch.autograd import Function
label_desc: Use image node_id 3 for calling the EntmaxBisectFunction obj's underlying member method code with example usage: obj._p(cls, X, alpha) and returns: cls